[Frank Kruse]

As been said:

Without a SYNC HD or SYNC X your ref generator is not going to do anything. It might be feeding a clock to your video card but PT won't lock to it without a SYNC interface attached and set to video ref.

But it sounds like you are using a PAL sync signal (old school black burst) for the BM card or did I misunderstand?. Just asking because when running HD the card wants to see a trilevel HD sync signal, so maybe that's cause your problems? Just a thought. I think your MUTEC box is an old black burst generator, no? If yes I would disconnect that entirely and try again.